Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Question
Chapter 12, Problem 7RQ
Program Plan Intro
Sequencer instruction:
- Programmable Logic Controller (PLC) sequencer instructions are used for controlling machines which provides a stepped sequence of repeatable operations.
- It simplifies the ladder
program by allowing the user to use a single or pair of instructions for performing complex operations. - Various sequencer instructions can be program based on the PLC manufacturer.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Category: CPU Wiring
Look at the following (incomplete) diagram of the Hack CPU taken from figure 5.9 of the textbook.
ALU output
outM
instruction
AM
inM
writeM
A
addressM
inc
reset
PC
po
Match the wires A, B, C, D and E with the logic expression that describes the signal they should
carry. The logic expressions use the operators not (!), and (&&) and or (I). The 16 wire instruction is
named instr. The A and C instruction formats are:
A-instruction: 0
V.
V.
V
C-instruction:
1
1
1
a
c1
c2
c3
c5
c6
d1
d2
d3 j1 j2 j3
Mire number:
15
14
13
12
11
10
9
8
6.
4
3
1
instr[15) && instr[3]
B.
instr[14]
ALU
Discuss the role of flags or condition codes in ALU instructions. How are they used to control program flow?
ASSEMBLY
The ROR instruction is only suitable for signed integers.
True
False
Chapter 12 Solutions
Programmable Logic Controllers
Knowledge Booster
Similar questions
- Discuss the importance of shift and rotate operations in ALU instructions.arrow_forwardHow CPU registers are related with modern computers in terms of handling logic circuitsarrow_forward(d) The table below shows the ALUcontrol signal of the datapath we discussed in class. Instruction Funct ALU Орсode ALUop ALU action operation field control Iw 00 load word XXXXXX add 0010 Sw 00 store word XXXXXX add 0010 beq 01 branch equal subtract 0110 XXXXXX R-type 10 add 100000 add 0010 R-type 10 subtract 100010 subtract 0110 R-type 10 AND 100100 AND 0000 R-type 10 OR 100101 OR 0001 R-type 10 set on less than 101010 set on less than 0111 You want to add the bne instruction into the datapath, which already includes the required hardware for the instruction. Write out the ALUop for bne and how you can determine whether the bne results in the branch to be taken.arrow_forward
- Explain the last data pointer register in simple terms.arrow_forwardExplain the instruction format in detail as per the no. of address in the instruction with examples?arrow_forwardDatapath Given the data path of the LC-3, give a complete description of the STR instruction, as outlined in the following questions STR R5, R4, #-28arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
EBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENT
EBK JAVA PROGRAMMING
Computer Science
ISBN:9781337671385
Author:FARRELL
Publisher:CENGAGE LEARNING - CONSIGNMENT